SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In

Rockwell Automation, Inc – ‘10-Q’ for 6/30/20 – ‘EX-101.DEF’

On:  Tuesday, 7/28/20, at 1:15pm ET   ·   For:  6/30/20   ·   Accession #:  1024478-20-26   ·   File #:  1-12383

Previous ‘10-Q’:  ‘10-Q’ on 4/28/20 for 3/31/20   ·   Next:  ‘10-Q’ on 1/26/21 for 12/31/20   ·   Latest:  ‘10-Q’ on 1/31/24 for 12/31/23   ·   4 References:   

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size

 7/28/20  Rockwell Automation, Inc          10-Q        6/30/20   85:9.5M

Quarterly Report   —   Form 10-Q   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML   1.28M 
 2: EX-10.1     Material Contract                                   HTML     44K 
 3: EX-15       Letter re: Unaudited Interim Financial Info         HTML     22K 
 4: EX-31.1     Certification -- §302 - SOA'02                      HTML     27K 
 5: EX-31.2     Certification -- §302 - SOA'02                      HTML     26K 
 6: EX-32.1     Certification -- §906 - SOA'02                      HTML     23K 
 7: EX-32.2     Certification -- §906 - SOA'02                      HTML     23K 
14: R1          Cover Page                                          HTML     74K 
15: R2          Consolidated Balance Sheet                          HTML    114K 
16: R3          Consolidated Balance Sheet (Parenthetical)          HTML     31K 
17: R4          Consolidated Statement of Operations                HTML     83K 
18: R5          Consolidated Statement of Comprehensive Income      HTML     52K 
19: R6          Consolidated Statement of Comprehensive Income      HTML     31K 
                (Parenthetical)                                                  
20: R7          Consolidated Statement of Cash Flows                HTML    118K 
21: R8          Consolidated Statement of Shareowners' Equity       HTML     68K 
22: R9          Consolidated Statement of Shareowners' Equity       HTML     24K 
                (Parenthetical)                                                  
23: R10         Basis of Presentation and Accounting Policies       HTML     72K 
24: R11         Revenue Recognition                                 HTML    130K 
25: R12         Share-Based Compensation                            HTML     41K 
26: R13         Inventories                                         HTML     32K 
27: R14         Acquisitions                                        HTML     68K 
28: R15         Goodwill and Other Intangible Assets                HTML     82K 
29: R16         Long-term and Short-term Debt                       HTML     48K 
30: R17         Other Current Liabilities                           HTML     38K 
31: R18         Investments                                         HTML     46K 
32: R19         Retirement Benefits                                 HTML     72K 
33: R20         Accumulated Other Comprehensive Loss                HTML    191K 
34: R21         Commitments and Contingent Liabilities              HTML     29K 
35: R22         Leases                                              HTML     58K 
36: R23         Income Taxes                                        HTML     32K 
37: R24         Business Segment Information                        HTML     70K 
38: R25         Basis of Presentation and Accounting Policies       HTML     44K 
                (Policies)                                                       
39: R26         Basis of Presentation and Accounting Policies       HTML     59K 
                (Tables)                                                         
40: R27         Revenue Recognition (Tables)                        HTML    128K 
41: R28         Share-Based Compensation (Tables)                   HTML     40K 
42: R29         Inventories (Tables)                                HTML     33K 
43: R30         Acquisitions (Tables)                               HTML     57K 
44: R31         Goodwill and Other Intangible Assets (Tables)       HTML     81K 
45: R32         Long-term and Short-term Debt - Summary of          HTML     46K 
                Long-term Debt Instruments (Tables)                              
46: R33         Other Current Liabilities (Tables)                  HTML     38K 
47: R34         Investments (Tables)                                HTML     37K 
48: R35         Retirement Benefits (Tables)                        HTML     72K 
49: R36         Accumulated Other Comprehensive Loss (Tables)       HTML    193K 
50: R37         Leases (Tables)                                     HTML     63K 
51: R38         Business Segment Information (Tables)               HTML     70K 
52: R39         Basis of Presentation and Accounting Policies -     HTML     49K 
                Narrative (Details)                                              
53: R40         Basis of Presentation and Accounting Policies -     HTML     54K 
                Reconciliation of Basic and Diluted Earnings Per                 
                Share (Details)                                                  
54: R41         Revenue Recognition - Narrative (Details)           HTML     29K 
55: R42         Revenue Recognition - Performance Obligation        HTML     31K 
                (Details)                                                        
56: R43         Revenue Recognition - Disaggregation of Revenue by  HTML     50K 
                Operating Segment and by Geographic Region                       
                (Details)                                                        
57: R44         Revenue Recognition - Disaggregation of Revenue by  HTML     40K 
                Operating Segment and Major Types of Products or                 
                Services (Details)                                               
58: R45         Revenue Recognition - Contract Balances (Details)   HTML     25K 
59: R46         Share-Based Compensation (Details)                  HTML     46K 
60: R47         Inventories (Details)                               HTML     32K 
61: R48         Acquisitions - Narrative (Details)                  HTML     88K 
62: R49         Acquisitions - Schedule of Recognized Identified    HTML     69K 
                Assets Acquired and Liabilities Assumed - Sensia                 
                (Details)                                                        
63: R50         Acquisitions - Schedule of Recognized Idenfified    HTML     54K 
                Assets Acquired and Liabilities Assumed - MESTECH,               
                Avnet, ASEM, and Kalypso (Details)                               
64: R51         Goodwill and Other Intangible Assets - Changes in   HTML     35K 
                Carrying Amount of Goodwill (Details)                            
65: R52         Goodwill and Other Intangible Assets - Other        HTML     69K 
                Intangible Assets (Details)                                      
66: R53         Long-term and Short-term Debt - Summary of Long     HTML     56K 
                Term Debt (Details)                                              
67: R54         Long-term and Short-term Debt - Narrative           HTML     56K 
                (Details)                                                        
68: R55         Other Current Liabilities - Schedule of Other       HTML     45K 
                Current Liabilities (Details)                                    
69: R56         Investments - Summary of Investments (Details)      HTML     36K 
70: R57         Investments - Narrative (Details)                   HTML     46K 
71: R58         Retirement Benefits - Components of Net Periodic    HTML     50K 
                Benefit Cost (Income) (Details)                                  
72: R59         Accumulated Other Comprehensive Loss - Changes in   HTML     63K 
                Accumulated Other Comprehensive Loss by Component                
                (Details)                                                        
73: R60         Accumulated Other Comprehensive Loss -              HTML     68K 
                Reclassifications out of Other Comprehensive Loss                
                (Details)                                                        
74: R61         Leases - Narrative (Details)                        HTML     27K 
75: R62         Leases - Components of Lease Expense (Details)      HTML     29K 
76: R63         Leases - Supplemental Balance Sheet (Details)       HTML     26K 
77: R64         Leases - Operating Lease Maturity ASU 842           HTML     42K 
                (Details)                                                        
78: R65         Leases - Operating Lease Maturity ASU 840           HTML     40K 
                (Details)                                                        
79: R66         Leases - Supplemental Cash Flows (Details)          HTML     27K 
80: R67         Income Taxes (Details)                              HTML     40K 
81: R68         Business Segment Information (Details)              HTML     53K 
83: XML         IDEA XML File -- Filing Summary                      XML    150K 
13: XML         XBRL Instance -- rok-20200630x10q_htm                XML   2.70M 
82: EXCEL       IDEA Workbook of Financial Reports                  XLSX     94K 
 9: EX-101.CAL  XBRL Calculations -- rok-20200630_cal                XML    300K 
10: EX-101.DEF  XBRL Definitions -- rok-20200630_def                 XML    519K 
11: EX-101.LAB  XBRL Labels -- rok-20200630_lab                      XML   1.47M 
12: EX-101.PRE  XBRL Presentations -- rok-20200630_pre               XML    874K 
 8: EX-101.SCH  XBRL Schema -- rok-20200630                          XSD    146K 
84: JSON        XBRL Instance as JSON Data -- MetaLinks              354±   526K 
85: ZIP         XBRL Zipped Folder -- 0001024478-20-000026-xbrl      Zip    283K 


‘EX-101.DEF’   —   XBRL Definitions — rok-20200630_def


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- XBRL Document Created with Wdesk from Workiva -->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLoss" xlink:href="rok-20200630.xsd#AccumulatedOtherComprehensiveLoss" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:href="rok-20200630.xsd#AccumulatedOtherComprehensiveLossChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossReclassificationsOutOfOtherComprehensiveLossDetails" xlink:href="rok-20200630.xsd#AccumulatedOtherComprehensiveLossReclassificationsOutOfOtherComprehensiveLossDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossTables" xlink:href="rok-20200630.xsd#AccumulatedOtherComprehensiveLossTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/Acquisitions" xlink:href="rok-20200630.xsd#Acquisitions" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AcquisitionsNarrativeDetails" xlink:href="rok-20200630.xsd#AcquisitionsNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AcquisitionsScheduleOfRecognizedIdenfifiedAssetsAcquiredAndLiabilitiesAssumedMestechAvnetAsemAndKalypsoDetails" xlink:href="rok-20200630.xsd#AcquisitionsScheduleOfRecognizedIdenfifiedAssetsAcquiredAndLiabilitiesAssumedMestechAvnetAsemAndKalypsoDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedSensiaDetails" xlink:href="rok-20200630.xsd#AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedSensiaDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/AcquisitionsTables" xlink:href="rok-20200630.xsd#AcquisitionsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPolicies" xlink:href="rok-20200630.xsd#BasisOfPresentationAndAccountingPolicies" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesNarrativeDetails" xlink:href="rok-20200630.xsd#BasisOfPresentationAndAccountingPoliciesNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesPolicies" xlink:href="rok-20200630.xsd#BasisOfPresentationAndAccountingPoliciesPolicies" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesReconciliationOfBasicAndDilutedEarningsPerShareDetails" xlink:href="rok-20200630.xsd#BasisOfPresentationAndAccountingPoliciesReconciliationOfBasicAndDilutedEarningsPerShareDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesTables" xlink:href="rok-20200630.xsd#BasisOfPresentationAndAccountingPoliciesTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BusinessSegmentInformation" xlink:href="rok-20200630.xsd#BusinessSegmentInformation" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BusinessSegmentInformationDetails" xlink:href="rok-20200630.xsd#BusinessSegmentInformationDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/BusinessSegmentInformationTables" xlink:href="rok-20200630.xsd#BusinessSegmentInformationTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/CommitmentsAndContingentLiabilities" xlink:href="rok-20200630.xsd#CommitmentsAndContingentLiabilities" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedBalanceSheet" xlink:href="rok-20200630.xsd#ConsolidatedBalanceSheet" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedBalanceSheetParenthetical" xlink:href="rok-20200630.xsd#ConsolidatedBalanceSheetParenthetical" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfCashFlows" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfCashFlows" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfComprehensiveIncome" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfComprehensiveIncome" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfComprehensiveIncomeParenthetical" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfComprehensiveIncomeParenthetical" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfOperations" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfOperations" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfShareownersEquity" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfShareownersEquity" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ConsolidatedStatementOfShareownersEquityParenthetical" xlink:href="rok-20200630.xsd#ConsolidatedStatementOfShareownersEquityParenthetical" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/CoverPage" xlink:href="rok-20200630.xsd#CoverPage" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssets" xlink:href="rok-20200630.xsd#GoodwillAndOtherIntangibleAssets" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails" xlink:href="rok-20200630.xsd#GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:href="rok-20200630.xsd#GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:href="rok-20200630.xsd#GoodwillAndOtherIntangibleAssetsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/IncomeTaxes" xlink:href="rok-20200630.xsd#IncomeTaxes" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/IncomeTaxesDetails" xlink:href="rok-20200630.xsd#IncomeTaxesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/Inventories" xlink:href="rok-20200630.xsd#Inventories" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/InventoriesDetails" xlink:href="rok-20200630.xsd#InventoriesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/InventoriesTables" xlink:href="rok-20200630.xsd#InventoriesTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/Investments" xlink:href="rok-20200630.xsd#Investments" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/InvestmentsNarrativeDetails" xlink:href="rok-20200630.xsd#InvestmentsNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/InvestmentsSummaryOfInvestmentsDetails" xlink:href="rok-20200630.xsd#InvestmentsSummaryOfInvestmentsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/InvestmentsTables" xlink:href="rok-20200630.xsd#InvestmentsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/Leases" xlink:href="rok-20200630.xsd#Leases" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesComponentsOfLeaseExpenseDetails" xlink:href="rok-20200630.xsd#LeasesComponentsOfLeaseExpenseDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesNarrativeDetails" xlink:href="rok-20200630.xsd#LeasesNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesOperatingLeaseMaturityAsu840Details" xlink:href="rok-20200630.xsd#LeasesOperatingLeaseMaturityAsu840Details" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesOperatingLeaseMaturityAsu842Details" xlink:href="rok-20200630.xsd#LeasesOperatingLeaseMaturityAsu842Details" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesSupplementalBalanceSheetDetails" xlink:href="rok-20200630.xsd#LeasesSupplementalBalanceSheetDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesSupplementalCashFlowsDetails" xlink:href="rok-20200630.xsd#LeasesSupplementalCashFlowsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LeasesTables" xlink:href="rok-20200630.xsd#LeasesTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LongTermAndShortTermDebt" xlink:href="rok-20200630.xsd#LongTermAndShortTermDebt" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtNarrativeDetails" xlink:href="rok-20200630.xsd#LongTermAndShortTermDebtNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtSummaryOfLongTermDebtDetails" xlink:href="rok-20200630.xsd#LongTermAndShortTermDebtSummaryOfLongTermDebtDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtSummaryOfLongTermDebtInstrumentsTables" xlink:href="rok-20200630.xsd#LongTermAndShortTermDebtSummaryOfLongTermDebtInstrumentsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/OtherCurrentLiabilities" xlink:href="rok-20200630.xsd#OtherCurrentLiabilities" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/OtherCurrentLiabilitiesScheduleOfOtherCurrentLiabilitiesDetails" xlink:href="rok-20200630.xsd#OtherCurrentLiabilitiesScheduleOfOtherCurrentLiabilitiesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/OtherCurrentLiabilitiesTables" xlink:href="rok-20200630.xsd#OtherCurrentLiabilitiesTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RetirementBenefits" xlink:href="rok-20200630.xsd#RetirementBenefits" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RetirementBenefitsComponentsOfNetPeriodicBenefitCostIncomeDetails" xlink:href="rok-20200630.xsd#RetirementBenefitsComponentsOfNetPeriodicBenefitCostIncomeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RetirementBenefitsTables" xlink:href="rok-20200630.xsd#RetirementBenefitsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognition" xlink:href="rok-20200630.xsd#RevenueRecognition" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionContractBalancesDetails" xlink:href="rok-20200630.xsd#RevenueRecognitionContractBalancesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndByGeographicRegionDetails" xlink:href="rok-20200630.xsd#RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndByGeographicRegionDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndMajorTypesOfProductsOrServicesDetails" xlink:href="rok-20200630.xsd#RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndMajorTypesOfProductsOrServicesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionNarrativeDetails" xlink:href="rok-20200630.xsd#RevenueRecognitionNarrativeDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionPerformanceObligationDetails" xlink:href="rok-20200630.xsd#RevenueRecognitionPerformanceObligationDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/RevenueRecognitionTables" xlink:href="rok-20200630.xsd#RevenueRecognitionTables" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ShareBasedCompensation" xlink:href="rok-20200630.xsd#ShareBasedCompensation" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ShareBasedCompensationDetails" xlink:href="rok-20200630.xsd#ShareBasedCompensationDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://www.rockwellautomation.com/role/ShareBasedCompensationTables" xlink:href="rok-20200630.xsd#ShareBasedCompensationTables" xlink:type="simple"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLoss" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_371D248E0000826C6B2558369ED58527" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5CF16661CA454829D6B758369ED56AAC" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_371D248E0000826C6B2558369ED58527" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5CF16661CA454829D6B758369ED56AAC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1F8CA4078B05C7F29A2958369ED54BDD" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5CF16661CA454829D6B758369ED56AAC" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1F8CA4078B05C7F29A2958369ED54BDD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_370036A401C9EA1F3E8858369ED50C4A_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1F8CA4078B05C7F29A2958369ED54BDD" xlink:to="loc_us-gaap_EquityComponentDomain_370036A401C9EA1F3E8858369ED50C4A_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_370036A401C9EA1F3E8858369ED50C4A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1F8CA4078B05C7F29A2958369ED54BDD" xlink:to="loc_us-gaap_EquityComponentDomain_370036A401C9EA1F3E8858369ED50C4A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_370036A401C9EA1F3E8858369ED50C4A" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_FD2C68BB298C004D7E9058369ED5FA74" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_FD2C68BB298C004D7E9058369ED5FA74" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_DD8B1F94B456931D388858369ED54B63" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:to="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_DD8B1F94B456931D388858369ED54B63" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_25005C10266DE35F9CB358369ED5C751" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:to="loc_us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_25005C10266DE35F9CB358369ED5C751" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_66F4D2DDD6AE6A43232E58369ED56AA6" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D64C2DD5E4D9882E202D58369ED55547" xlink:to="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_66F4D2DDD6AE6A43232E58369ED56AA6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_371D248E0000826C6B2558369ED58527" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_FC78DBAA6A9DA2BD7AAA58369ED5FEA0" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_FC78DBAA6A9DA2BD7AAA58369ED5FEA0" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_73E2A295C1554BB387BE58369ED5BB81" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_73E2A295C1554BB387BE58369ED5BB81" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E5059EB9E24E943F0DE558369ED59110" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E5059EB9E24E943F0DE558369ED59110" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2DD73D5DB14A9383CE7058369ED53186" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2DD73D5DB14A9383CE7058369ED53186" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_DEA97A7ED9006335447C58369ED5EC8D" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_ADE5EF016A90718EA14558369ED5A9CC" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_DEA97A7ED9006335447C58369ED5EC8D" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossReclassificationsOutOfOtherComprehensiveLossDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_96FA5DACCF51F0AD08D74E0819B85549" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_96FA5DACCF51F0AD08D74E0819B85549" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_62CF5F2379612AD3190B4E0819B89DFF" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_96FA5DACCF51F0AD08D74E0819B85549" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_62CF5F2379612AD3190B4E0819B89DFF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3523E4D788277D07BE2A4E0819B8F585_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_62CF5F2379612AD3190B4E0819B89DFF" xlink:to="loc_us-gaap_EquityComponentDomain_3523E4D788277D07BE2A4E0819B8F585_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_3523E4D788277D07BE2A4E0819B8F585" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_62CF5F2379612AD3190B4E0819B89DFF" xlink:to="loc_us-gaap_EquityComponentDomain_3523E4D788277D07BE2A4E0819B8F585" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3523E4D788277D07BE2A4E0819B8F585" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_9343451DEEBECE888B124E0819B8B0B0" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_9343451DEEBECE888B124E0819B8B0B0" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_920E5A24271A15F9E9BC4E0819C85F04" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_920E5A24271A15F9E9BC4E0819C85F04" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligationMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligationMember_F8B0F230D47EE4FD0BD34E0819C899A2" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligationMember_F8B0F230D47EE4FD0BD34E0819C899A2" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_82C9CA2BC988B58A3B9A4E0819C8454A" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_8B08082DBFB79926B4314E0819B8934B" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_82C9CA2BC988B58A3B9A4E0819C8454A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_4640DA238C79663FF3284E0819C8CE87" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_96FA5DACCF51F0AD08D74E0819B85549" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_4640DA238C79663FF3284E0819C8CE87" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4640DA238C79663FF3284E0819C8CE87" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4640DA238C79663FF3284E0819C8CE87" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_E9534F174505724775074E0819C82C5F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_E9534F174505724775074E0819C82C5F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryLockMember" xlink:label="loc_us-gaap_TreasuryLockMember_298A957D481C377932714E0819C8FFF3" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8E9F3EB5C4137A52AC494E0819C8F155" xlink:to="loc_us-gaap_TreasuryLockMember_298A957D481C377932714E0819C8FFF3" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_667672889BEAAECADF424E0819C870E5" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_96FA5DACCF51F0AD08D74E0819B85549" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_667672889BEAAECADF424E0819C870E5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_B86D58AFD1E24F39C5F74E0819C8E557_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_667672889BEAAECADF424E0819C870E5" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_B86D58AFD1E24F39C5F74E0819C8E557_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_B86D58AFD1E24F39C5F74E0819C8E557" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_667672889BEAAECADF424E0819C870E5" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_B86D58AFD1E24F39C5F74E0819C8E557" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_522685778BFC6CB20FF04E0819C86569" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_B86D58AFD1E24F39C5F74E0819C8E557" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_522685778BFC6CB20FF04E0819C86569" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A7F0747CAEB25F1DE0854E0819C8F7E6" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A7F0747CAEB25F1DE0854E0819C8F7E6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_B8AE6180096211EBA88C4E0819C88ADA" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_B8AE6180096211EBA88C4E0819C88ADA" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_96421A4ADEC8B8E0E9CE4E0819C8499B" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_96421A4ADEC8B8E0E9CE4E0819C8499B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_A776BC48ABD78800E4874E0819C84C87" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_A776BC48ABD78800E4874E0819C84C87" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_3B7611D4FDA3220650514E0819C8E8EE" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_InterestExpense_3B7611D4FDA3220650514E0819C8E8EE" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_B32F4388862939F2BF594E0819C8DA7C" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_B32F4388862939F2BF594E0819C8DA7C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_F389D4317BBFA9C6BBE74E0819C86C55" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_D21084E6E4AA0DBB3A974E0819C8A31E" xlink:to="loc_us-gaap_NetIncomeLoss_F389D4317BBFA9C6BBE74E0819C86C55" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AccumulatedOtherComprehensiveLossTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/Acquisitions" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_371FE0FF6B719DF08200904AAEF5C603" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_371FE0FF6B719DF08200904AAEF5C603" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_371FE0FF6B719DF08200904AAEF5C603" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_371FE0FF6B719DF08200904AAEF5C603" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SensiaMember" xlink:label="loc_rok_SensiaMember_51034267FCDB97685CEB904AAEF6A20C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3" xlink:to="loc_rok_SensiaMember_51034267FCDB97685CEB904AAEF6A20C" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_MESTECHAvnetASEMandKalypsoMember" xlink:label="loc_rok_MESTECHAvnetASEMandKalypsoMember_E407EDAE22ADB1AC7478904AAEF6635E" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D8905E17C1371AE9BE22904AAEF677E3" xlink:to="loc_rok_MESTECHAvnetASEMandKalypsoMember_E407EDAE22ADB1AC7478904AAEF6635E" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_AvnetDataSecurityLTDMember" xlink:label="loc_rok_AvnetDataSecurityLTDMember_118F4C15A0FA16AF9720904AAEF62A8A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rok_MESTECHAvnetASEMandKalypsoMember_E407EDAE22ADB1AC7478904AAEF6635E" xlink:to="loc_rok_AvnetDataSecurityLTDMember_118F4C15A0FA16AF9720904AAEF62A8A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A5F0087B6FDA2CBF75A1904AAEF73D07" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A5F0087B6FDA2CBF75A1904AAEF73D07" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A5F0087B6FDA2CBF75A1904AAEF73D07" xlink:to="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A5F0087B6FDA2CBF75A1904AAEF73D07" xlink:to="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ArchitectureAndSoftwareMember" xlink:label="loc_rok_ArchitectureAndSoftwareMember_2E945960FDF45D244118904AAEF74F71" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796" xlink:to="loc_rok_ArchitectureAndSoftwareMember_2E945960FDF45D244118904AAEF74F71" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ControlProductsAndSolutionsMember" xlink:label="loc_rok_ControlProductsAndSolutionsMember_C530FB5A36A331FCF5E8904AAEF7F10D" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_E07CFAF35E49B9C237F4904AAEF7F796" xlink:to="loc_rok_ControlProductsAndSolutionsMember_C530FB5A36A331FCF5E8904AAEF7F10D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_B4252CB4BECB03BE5DD1904AAEF8132B" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:to="loc_srt_RangeAxis_B4252CB4BECB03BE5DD1904AAEF8132B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_B4252CB4BECB03BE5DD1904AAEF8132B" xlink:to="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_B4252CB4BECB03BE5DD1904AAEF8132B" xlink:to="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_9668ACCF1C937C2D9A00904AAEF8E5EC" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652" xlink:to="loc_srt_MinimumMember_9668ACCF1C937C2D9A00904AAEF8E5EC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_411C6ECEAE8E1CE8AF9D904AAEF8E3D1" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1E7C0B17134A25B2C4E7904AAEF83652" xlink:to="loc_srt_MaximumMember_411C6ECEAE8E1CE8AF9D904AAEF8E3D1" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_FB218F7DC3C088B87DBB904AAEF87742" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_FB218F7DC3C088B87DBB904AAEF87742" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_FB218F7DC3C088B87DBB904AAEF87742" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_FB218F7DC3C088B87DBB904AAEF87742" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_CustomerRelationshipsTechnologyPatentsMember" xlink:label="loc_rok_CustomerRelationshipsTechnologyPatentsMember_950CABF764BE7D807E22904AAEF9857D" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF" xlink:to="loc_rok_CustomerRelationshipsTechnologyPatentsMember_950CABF764BE7D807E22904AAEF9857D" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_TechnologyandTrademarksMember" xlink:label="loc_rok_TechnologyandTrademarksMember_9B354A2EFD3661DF9432904AAEF9E671" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5650EBF4AB4B84BDE4E3904AAEF9EBCF" xlink:to="loc_rok_TechnologyandTrademarksMember_9B354A2EFD3661DF9432904AAEF9E671" xlink:type="arc"/>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_5F18BB0F4CB998532056904AAEF9A0F3" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7809E824C700DC357B93904AAEF5FA0B" xlink:to="loc_dei_LegalEntityAxis_5F18BB0F4CB998532056904AAEF9A0F3" xlink:type="arc"/>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_99A30A31C94265AB9C4F904AAEF979E5_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5F18BB0F4CB998532056904AAEF9A0F3" xlink:to="loc_dei_EntityDomain_99A30A31C94265AB9C4F904AAEF979E5_default" xlink:type="arc"/>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_99A30A31C94265AB9C4F904AAEF979E5" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5F18BB0F4CB998532056904AAEF9A0F3" xlink:to="loc_dei_EntityDomain_99A30A31C94265AB9C4F904AAEF979E5" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SchlumbergerMember" xlink:label="loc_rok_SchlumbergerMember_54FCF79F476A01A0D4E7904AAEFAF772" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_99A30A31C94265AB9C4F904AAEF979E5" xlink:to="loc_rok_SchlumbergerMember_54FCF79F476A01A0D4E7904AAEFAF772" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_B97444001FCEBED68E20904AAEFA5887" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_B97444001FCEBED68E20904AAEFA5887" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_8D17367A251A38C58BF2904AAEFA757B" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_8D17367A251A38C58BF2904AAEFA757B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_6C21671DCC7680D93400904AAEFBD2BE" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_6C21671DCC7680D93400904AAEFBD2BE" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_CDFF1D86B239BA451878904AAEFB320A" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_CDFF1D86B239BA451878904AAEFB320A" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_FiniteLivedIntangibleAssetsAcquiredDiscountRate" xlink:label="loc_rok_FiniteLivedIntangibleAssetsAcquiredDiscountRate_17CA90EDC60E5ED1A108904AAEFBC766" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_rok_FiniteLivedIntangibleAssetsAcquiredDiscountRate_17CA90EDC60E5ED1A108904AAEFBC766" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_FiniteLivedIntangibleAssetsAcquiredCustomerAttritionRate" xlink:label="loc_rok_FiniteLivedIntangibleAssetsAcquiredCustomerAttritionRate_0284DFA5D6EA66B55FC8904AAEFB6208" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_rok_FiniteLivedIntangibleAssetsAcquiredCustomerAttritionRate_0284DFA5D6EA66B55FC8904AAEFB6208" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_C132066547C079DC21F8904AAEFB2AE8" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_C132066547C079DC21F8904AAEFB2AE8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_B1336D30E5ABDA91C352904AAEFB46D0" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_B1336D30E5ABDA91C352904AAEFB46D0" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_NumberOfYearsOfExperience" xlink:label="loc_rok_NumberOfYearsOfExperience_04750EDF184ED79284C6904AAEFC6B42" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_rok_NumberOfYearsOfExperience_04750EDF184ED79284C6904AAEFC6B42" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_F78F363ED8D9F6F73982904AAEFC3515" xlink:type="locator"/>
<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_Goodwill_F78F363ED8D9F6F73982904AAEFC3515" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_BDD4F39D058DC65A22AD904AAEFCD20B" xlink:type="locator"/>
<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_BDD4F39D058DC65A22AD904AAEFCD20B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationAsset" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationAsset_CD16509C9CD0C349E8949057CBF42950" xlink:type="locator"/>
<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationAsset_CD16509C9CD0C349E8949057CBF42950" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfBusinessesAcquired" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_0650EA8E5E0158B88EC0905577782CB6" xlink:type="locator"/>
<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_0650EA8E5E0158B88EC0905577782CB6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_FFFA71ED9A6519B8B01A90577F6689F2" xlink:type="locator"/>
<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_A7CC2AB76D7CD6EEE511904AAEFA140B" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_FFFA71ED9A6519B8B01A90577F6689F2" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AcquisitionsScheduleOfRecognizedIdenfifiedAssetsAcquiredAndLiabilitiesAssumedMestechAvnetAsemAndKalypsoDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C119F4DBA81D051DD7977926D726B73B" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C119F4DBA81D051DD7977926D726B73B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_210BFF63B5CE6629600E7926D727FF34" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C119F4DBA81D051DD7977926D726B73B" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_210BFF63B5CE6629600E7926D727FF34" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A62258E587E3CF5B3BA87926D7273E71_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_210BFF63B5CE6629600E7926D727FF34" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A62258E587E3CF5B3BA87926D7273E71_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A62258E587E3CF5B3BA87926D7273E71" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_210BFF63B5CE6629600E7926D727FF34" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A62258E587E3CF5B3BA87926D7273E71" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_MESTECHAvnetASEMandKalypsoMember" xlink:label="loc_rok_MESTECHAvnetASEMandKalypsoMember_AFE9FA563598A165BBBE7926D727A4EA" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A62258E587E3CF5B3BA87926D7273E71" xlink:to="loc_rok_MESTECHAvnetASEMandKalypsoMember_AFE9FA563598A165BBBE7926D727A4EA" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_AF156F6FF5ED862BFF647926D7288B7D" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_AF156F6FF5ED862BFF647926D7288B7D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_1AA0022265476B76EF817926D7286D9B" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_1AA0022265476B76EF817926D7286D9B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_905709A8646D36F624DE7926D7282B0F" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_905709A8646D36F624DE7926D7282B0F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_FD8731DC1863F55076197926D728265B" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_FD8731DC1863F55076197926D728265B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2DF865A8A38A9352C6F27926D7286AEC" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2DF865A8A38A9352C6F27926D7286AEC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_102D8EBBB2DEF073343C7926D7293E55" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_Goodwill_102D8EBBB2DEF073343C7926D7293E55" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_3BAA33FCAEC51FC474047926D72989D1" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_3BAA33FCAEC51FC474047926D72989D1" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_EEE226FD2512D0ACB2D67926D7294318" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_EEE226FD2512D0ACB2D67926D7294318" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_5C65BA63DAA90F59CFEF7926D7297829" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_5C65BA63DAA90F59CFEF7926D7297829" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_65972333394FCD5DEDF37926D72901FB" xlink:type="locator"/>
<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_65972333394FCD5DEDF37926D72901FB" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsAndGoodwill" xlink:label="loc_rok_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsAndGoodwill_3AF4E938322AC67F0F017926D72A3C34" xlink:type="locator"/>
<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_rok_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsAndGoodwill_3AF4E938322AC67F0F017926D72A3C34" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_42743520167434A2A7E67926D72A127D" xlink:type="locator"/>
<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4761094B41151DDEA507926D7281BDB" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_42743520167434A2A7E67926D72A127D" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedSensiaDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_4043C09201C4C1735A92827E7083732D" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DE5F9DBD58D0BC79AF3F827E7082AF6C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4043C09201C4C1735A92827E7083732D" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DE5F9DBD58D0BC79AF3F827E7082AF6C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_947DA7971B4B75BB55EB827E70826AF3" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DE5F9DBD58D0BC79AF3F827E7082AF6C" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_947DA7971B4B75BB55EB827E70826AF3" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_B224FFD60A74388D3BB4827E70821563_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_947DA7971B4B75BB55EB827E70826AF3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_B224FFD60A74388D3BB4827E70821563_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_B224FFD60A74388D3BB4827E70821563" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_947DA7971B4B75BB55EB827E70826AF3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_B224FFD60A74388D3BB4827E70821563" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SensiaMember" xlink:label="loc_rok_SensiaMember_0EF6D9566E84475A43E7827E7083FE91" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_B224FFD60A74388D3BB4827E70821563" xlink:to="loc_rok_SensiaMember_0EF6D9566E84475A43E7827E7083FE91" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4043C09201C4C1735A92827E7083732D" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_F647562DD36988225E3D827E7083C757" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_F647562DD36988225E3D827E7083C757" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_1CD5DD3F010414315DDE827E7084ED7D" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_1CD5DD3F010414315DDE827E7084ED7D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_68B3207D32B0E1028983827E70849639" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_68B3207D32B0E1028983827E70849639" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_6F733B91F1E4D65D5BAE827E70846A99" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_6F733B91F1E4D65D5BAE827E70846A99" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_6FCC237D3CB3539AC847827E70849B9C" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_6FCC237D3CB3539AC847827E70849B9C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_579FA7F003821E00FF51827E7084F9CD" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_Goodwill_579FA7F003821E00FF51827E7084F9CD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_D7261DEBF0B431EBA1E6827E7084B2A0" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_D7261DEBF0B431EBA1E6827E7084B2A0" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_B025A6EAFC7175638211827E70857637" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_B025A6EAFC7175638211827E70857637" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_678ADC124333F9D8CE5E827E70852F44" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_678ADC124333F9D8CE5E827E70852F44" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_0AEEE912A8923C74D101827E708501B3" xlink:type="locator"/>
<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_0AEEE912A8923C74D101827E708501B3" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_EF1F12174CDF192F2777827E7085A854" xlink:type="locator"/>
<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_EF1F12174CDF192F2777827E7085A854" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_8A8011891F84AE230C63827E7085D01B" xlink:type="locator"/>
<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_71C83D0453EAF7CBFCE8827E70838F82" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_8A8011891F84AE230C63827E7085D01B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4043C09201C4C1735A92827E7083732D" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_FC65D976C9729A23C688827E708656A9" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_FC65D976C9729A23C688827E708656A9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_CB2DB933333003DE4038827E7086C0CE" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_CB2DB933333003DE4038827E7086C0CE" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_BusinessCombinationAdditionalPaidInCapitalAdjustment" xlink:label="loc_rok_BusinessCombinationAdditionalPaidInCapitalAdjustment_5BDEEE2BF95E88902F9C827E70869AEF" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:to="loc_rok_BusinessCombinationAdditionalPaidInCapitalAdjustment_5BDEEE2BF95E88902F9C827E70869AEF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredOther1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredOther1_0F4F33CD3BC592AC998F827E70866A87" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredOther1_0F4F33CD3BC592AC998F827E70866A87" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_D81DF2612DBF85B0E498827E70864C20" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_D81DD57D05180A9BEFDA827E70859B08" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_D81DF2612DBF85B0E498827E70864C20" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/AcquisitionsTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPolicies" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesNarrativeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_88ECD058AF1369675A777803F5D2714C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_88ECD058AF1369675A777803F5D2714C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_BE6D64270777416E4F257803F5D22218" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_88ECD058AF1369675A777803F5D2714C" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_BE6D64270777416E4F257803F5D22218" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_540C00CAB035A5D6212A7803F5D22457_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BE6D64270777416E4F257803F5D22218" xlink:to="loc_us-gaap_EquityComponentDomain_540C00CAB035A5D6212A7803F5D22457_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_540C00CAB035A5D6212A7803F5D22457" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_BE6D64270777416E4F257803F5D22218" xlink:to="loc_us-gaap_EquityComponentDomain_540C00CAB035A5D6212A7803F5D22457" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_24FA5170ED52C5E2A3607803F5D36E4D" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_540C00CAB035A5D6212A7803F5D22457" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_24FA5170ED52C5E2A3607803F5D36E4D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis" xlink:label="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_627D047F95216933AAB27803F5D32CCC" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_88ECD058AF1369675A777803F5D2714C" xlink:to="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_627D047F95216933AAB27803F5D32CCC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_4D99368DC131327BA8D57803F5D39760_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_627D047F95216933AAB27803F5D32CCC" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_4D99368DC131327BA8D57803F5D39760_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ChangeInAccountingPrincipleMember" xlink:label="loc_us-gaap_ChangeInAccountingPrincipleMember_4D99368DC131327BA8D57803F5D39760" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis_627D047F95216933AAB27803F5D32CCC" xlink:to="loc_us-gaap_ChangeInAccountingPrincipleMember_4D99368DC131327BA8D57803F5D39760" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_C271DFF93726697167C87803F5D4D501" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingPrincipleMember_4D99368DC131327BA8D57803F5D39760" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_C271DFF93726697167C87803F5D4D501" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_98308AAF1FB487EA00C47803F5D44D45" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_88ECD058AF1369675A777803F5D2714C" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_98308AAF1FB487EA00C47803F5D44D45" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_E642A55E144E86383B9F7803F5D53372_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_98308AAF1FB487EA00C47803F5D44D45" xlink:to="loc_us-gaap_TypeOfAdoptionMember_E642A55E144E86383B9F7803F5D53372_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_E642A55E144E86383B9F7803F5D53372" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_98308AAF1FB487EA00C47803F5D44D45" xlink:to="loc_us-gaap_TypeOfAdoptionMember_E642A55E144E86383B9F7803F5D53372" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_285A4B4D957344640F7D7803F5D52235" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_E642A55E144E86383B9F7803F5D53372" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_285A4B4D957344640F7D7803F5D52235" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_63D7FABE7C1BE50DDC3B7803F5D517BA" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_63D7FABE7C1BE50DDC3B7803F5D517BA" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_AllowanceForCertainCustomerReturnsRebatesAndIncentivesInReceivable" xlink:label="loc_rok_AllowanceForCertainCustomerReturnsRebatesAndIncentivesInReceivable_FEC99E45D5ACD76E97437803F5D6A9C8" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_rok_AllowanceForCertainCustomerReturnsRebatesAndIncentivesInReceivable_FEC99E45D5ACD76E97437803F5D6A9C8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_5B68498CE8AA76EAC21A7803F5D619E1" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_5B68498CE8AA76EAC21A7803F5D619E1" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_C829BDA2F287EABB0BC57803F5D63A4B" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_C829BDA2F287EABB0BC57803F5D63A4B" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_StockRepurchasedDuringPeriodValueOutstanding" xlink:label="loc_rok_StockRepurchasedDuringPeriodValueOutstanding_9FE7B45954768A0A5BCC7803F5D65FF9" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_rok_StockRepurchasedDuringPeriodValueOutstanding_9FE7B45954768A0A5BCC7803F5D65FF9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_DA5AF8001AE2C1B2E1077803F5D62E51" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_DA5AF8001AE2C1B2E1077803F5D62E51" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_C63DB268560FD217996F7803F5D79BA5" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_OperatingLeaseLiability_C63DB268560FD217996F7803F5D79BA5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect" xlink:label="loc_us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect_CC7C12FD64C01CB7F9D27803F5D7B059" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_E2956D3D5A901AB5758B7803F5D57A4B" xlink:to="loc_us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect_CC7C12FD64C01CB7F9D27803F5D7B059" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesPolicies" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesReconciliationOfBasicAndDilutedEarningsPerShareDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BasisOfPresentationAndAccountingPoliciesTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BusinessSegmentInformation" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BusinessSegmentInformationDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_446C57B718FC580533F0909F2348C175" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_FA296B292338F3E8739A909F2346D178" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_446C57B718FC580533F0909F2348C175" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_FA296B292338F3E8739A909F2346D178" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_257882B8EA613AD9F8B7909F234633B1" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_FA296B292338F3E8739A909F2346D178" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_257882B8EA613AD9F8B7909F234633B1" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_257882B8EA613AD9F8B7909F234633B1" xlink:to="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_257882B8EA613AD9F8B7909F234633B1" xlink:to="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ArchitectureAndSoftwareMember" xlink:label="loc_rok_ArchitectureAndSoftwareMember_FC5448DEC8B9266F2F9F909F2347832F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0" xlink:to="loc_rok_ArchitectureAndSoftwareMember_FC5448DEC8B9266F2F9F909F2347832F" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ControlProductsAndSolutionsMember" xlink:label="loc_rok_ControlProductsAndSolutionsMember_6198FC3FCE85CB260DFE909F2347DF2A" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_54FC52B06DBCB63F56C4909F23478ED0" xlink:to="loc_rok_ControlProductsAndSolutionsMember_6198FC3FCE85CB260DFE909F2347DF2A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_BE5B807F0DB1705F52DE909F234773E7" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_FA296B292338F3E8739A909F2346D178" xlink:to="loc_srt_ConsolidationItemsAxis_BE5B807F0DB1705F52DE909F234773E7" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_1EA4BDF687060ED5D79E909F2348C369_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_BE5B807F0DB1705F52DE909F234773E7" xlink:to="loc_srt_ConsolidationItemsDomain_1EA4BDF687060ED5D79E909F2348C369_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_1EA4BDF687060ED5D79E909F2348C369" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_BE5B807F0DB1705F52DE909F234773E7" xlink:to="loc_srt_ConsolidationItemsDomain_1EA4BDF687060ED5D79E909F2348C369" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_6D1537A1D2CDE134F906909F23482576" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_1EA4BDF687060ED5D79E909F2348C369" xlink:to="loc_us-gaap_OperatingSegmentsMember_6D1537A1D2CDE134F906909F23482576" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_446C57B718FC580533F0909F2348C175" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2D15BE1F2B07C5AE5675909F2348E76A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2D15BE1F2B07C5AE5675909F2348E76A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_91D4022705B0E693A326909F23497FFB" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_us-gaap_OperatingIncomeLoss_91D4022705B0E693A326909F23497FFB" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_PurchaseAccountingDepreciationAndAmortization" xlink:label="loc_rok_PurchaseAccountingDepreciationAndAmortization_394E0B607D49D6C19DCF909F234A373F" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_rok_PurchaseAccountingDepreciationAndAmortization_394E0B607D49D6C19DCF909F234A373F" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_GeneralCorporateNet" xlink:label="loc_rok_GeneralCorporateNet_2159EB2129766B437369909F234AABA2" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_rok_GeneralCorporateNet_2159EB2129766B437369909F234AABA2" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_NonOperatingPensionCost" xlink:label="loc_rok_NonOperatingPensionCost_5D2B94638EC2D4D831C6909F234B4C06" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_rok_NonOperatingPensionCost_5D2B94638EC2D4D831C6909F234B4C06" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_EquitySecuritiesFVNIUnrealizedGainLossLossOnInvestment" xlink:label="loc_rok_EquitySecuritiesFVNIUnrealizedGainLossLossOnInvestment_AA6E863B7D85D538F5A8909F234B5D14" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_rok_EquitySecuritiesFVNIUnrealizedGainLossLossOnInvestment_AA6E863B7D85D538F5A8909F234B5D14" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_EquitySecuritiesFVNIUnrealizedGainLossValuationAdjustment" xlink:label="loc_rok_EquitySecuritiesFVNIUnrealizedGainLossValuationAdjustment_A9E63DD1D74438080CCF909F234BB310" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_rok_EquitySecuritiesFVNIUnrealizedGainLossValuationAdjustment_A9E63DD1D74438080CCF909F234BB310" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestRevenueExpenseNet" xlink:label="loc_us-gaap_InterestRevenueExpenseNet_10E1045BE00053B1BEB5909F234BC035" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_us-gaap_InterestRevenueExpenseNet_10E1045BE00053B1BEB5909F234BC035" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_29FBCDB8CE808D509371909F234B34DE" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_FDA29E01A2A1EC9A8B1B909F23485A08" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_29FBCDB8CE808D509371909F234B34DE" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/BusinessSegmentInformationTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/CommitmentsAndContingentLiabilities" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedBalanceSheet" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedBalanceSheetParenthetical" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfCashFlows" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfComprehensiveIncome" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfComprehensiveIncomeParenthetical" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfOperations" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_E0724BB275DD51CF0BE67926D801A1E7" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_StatementTable_E0724BB275DD51CF0BE67926D801A1E7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_E0C9CB9BFB6AA654CED37926D802F6D9" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_E0724BB275DD51CF0BE67926D801A1E7" xlink:to="loc_srt_ProductOrServiceAxis_E0C9CB9BFB6AA654CED37926D802F6D9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_E0C9CB9BFB6AA654CED37926D802F6D9" xlink:to="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_E0C9CB9BFB6AA654CED37926D802F6D9" xlink:to="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ProductsandSolutionsMember" xlink:label="loc_rok_ProductsandSolutionsMember_9820266DCF6D3446F59B7926D8028B89" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55" xlink:to="loc_rok_ProductsandSolutionsMember_9820266DCF6D3446F59B7926D8028B89" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ServiceMember" xlink:label="loc_us-gaap_ServiceMember_FD93313DC4F2997514217926D80296AD" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_604B4FB445410639293C7926D8029A55" xlink:to="loc_us-gaap_ServiceMember_FD93313DC4F2997514217926D80296AD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_A0C2102EECFB2005FE877926D8036E7A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_RevenuesAbstract_A0C2102EECFB2005FE877926D8036E7A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4ABB55D1A280E29C1B567926D8032B9C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_A0C2102EECFB2005FE877926D8036E7A" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4ABB55D1A280E29C1B567926D8032B9C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_E966C47681C71FDA9AF77926D803C146" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_E966C47681C71FDA9AF77926D803C146" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_9BF7B4ECE003CDB5AAE57926D804ED9C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_E966C47681C71FDA9AF77926D803C146" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_9BF7B4ECE003CDB5AAE57926D804ED9C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_C0443353DDCFF19F5FAE7926D8042841" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_GrossProfit_C0443353DDCFF19F5FAE7926D8042841" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_9654B2ED030351331C397926D804A2BC" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_9654B2ED030351331C397926D804A2BC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnInvestments" xlink:label="loc_us-gaap_GainLossOnInvestments_7E1E8DEE2BA39C8B1E297926D80451C4" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_GainLossOnInvestments_7E1E8DEE2BA39C8B1E297926D80451C4" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_OtherIncomeExpense" xlink:label="loc_rok_OtherIncomeExpense_269FB8F03EDC9EF13E147926D804E33A" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_rok_OtherIncomeExpense_269FB8F03EDC9EF13E147926D804E33A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_1204019145CB963A08B07926D8041319" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_InterestExpense_1204019145CB963A08B07926D8041319" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_B1E7CCE7F4E565D2EE7C7926D805BE3F" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_B1E7CCE7F4E565D2EE7C7926D805BE3F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_FDBE89C8B132C6F8E1EE7926D8057BAF" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_FDBE89C8B132C6F8E1EE7926D8057BAF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_3DECFED92EBA1CF828517926D805384A" xlink:type="locator"/>
<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_ProfitLoss_3DECFED92EBA1CF828517926D805384A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_EA3B4ACB19FDE29C4EFB7926D805C80A" xlink:type="locator"/>
<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_EA3B4ACB19FDE29C4EFB7926D805C80A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_7597A05F6CCF1647F7DE7926D8057C58" xlink:type="locator"/>
<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_NetIncomeLoss_7597A05F6CCF1647F7DE7926D8057C58" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_5FA1EC3020459B9E9DA57926D8065068" xlink:type="locator"/>
<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_EarningsPerShareAbstract_5FA1EC3020459B9E9DA57926D8065068" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_A662EA49AF9B4F4CA59F7926D8064170" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_5FA1EC3020459B9E9DA57926D8065068" xlink:to="loc_us-gaap_EarningsPerShareBasic_A662EA49AF9B4F4CA59F7926D8064170" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_E6C8FFBCF55BAB11CA897926D8068194" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_5FA1EC3020459B9E9DA57926D8065068" xlink:to="loc_us-gaap_EarningsPerShareDiluted_E6C8FFBCF55BAB11CA897926D8068194" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_CED986A810AA8867788F7926D806DD60" xlink:type="locator"/>
<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_902E174293C1F9B35B907926D8038385" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_CED986A810AA8867788F7926D806DD60" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8448EEC22B41406CFD797926D806A754" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_CED986A810AA8867788F7926D806DD60" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8448EEC22B41406CFD797926D806A754" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_72F12CAA7CB3567058037926D8062049" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_CED986A810AA8867788F7926D806DD60" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_72F12CAA7CB3567058037926D8062049" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfShareownersEquity" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2F3C72487A49BDD8349F909F24C5F2E7" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_51BCA628126DE9592C78909F24C3FA98" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2F3C72487A49BDD8349F909F24C5F2E7" xlink:to="loc_us-gaap_StatementTable_51BCA628126DE9592C78909F24C3FA98" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_CE183734FA57220446F8909F24C30837" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_51BCA628126DE9592C78909F24C3FA98" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_CE183734FA57220446F8909F24C30837" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_CE183734FA57220446F8909F24C30837" xlink:to="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_CE183734FA57220446F8909F24C30837" xlink:to="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F" xlink:to="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_F8BDC5E9258886642209909F24C4A72F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:to="loc_us-gaap_CommonStockMember_F8BDC5E9258886642209909F24C4A72F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_D76C849783BA66BACD53909F24C5F6CD" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_D76C849783BA66BACD53909F24C5F6CD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_6153AE957160415D46F1909F24C57CCA" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:to="loc_us-gaap_RetainedEarningsMember_6153AE957160415D46F1909F24C57CCA" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_F3F064BD7F1D295F2D89909F24C55E9E" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_F3F064BD7F1D295F2D89909F24C55E9E" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_859F3F0C8F5ECF3AD005909F24C5EAF5" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_3534743B62AF28D502E4909F24C42A07" xlink:to="loc_us-gaap_TreasuryStockMember_859F3F0C8F5ECF3AD005909F24C5EAF5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_71584A3229DF65901A0C909F24C5C210" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_31AAC6E5E4423F49386E909F24C4541F" xlink:to="loc_us-gaap_NoncontrollingInterestMember_71584A3229DF65901A0C909F24C5C210" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2F3C72487A49BDD8349F909F24C5F2E7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_6E6F315B1C0B60DAAF41909F24C6162A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_6E6F315B1C0B60DAAF41909F24C6162A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_7EB524F721A1C7B87B7C909F24C62EDF" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_ProfitLoss_7EB524F721A1C7B87B7C909F24C62EDF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_7FAB7A4DEABA0C79402B909F24C6001A" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_7FAB7A4DEABA0C79402B909F24C6001A" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsAndShareBasedPaymentArrangementIncreaseForCostRecognition" xlink:label="loc_rok_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsAndShareBasedPaymentArrangementIncreaseForCostRecognition_14C163A16F5F12E3BDD3909F24C620F2" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_rok_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsAndShareBasedPaymentArrangementIncreaseForCostRecognition_14C163A16F5F12E3BDD3909F24C620F2" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_2A418D84B5F8BCA8174E909F24C7EA93" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_2A418D84B5F8BCA8174E909F24C7EA93" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions_6DCFF4FF6B6FEE0DB054909F24C71B22" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions_6DCFF4FF6B6FEE0DB054909F24C71B22" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_FD2F3F20E78BCBC027B2909F24C73863" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_FD2F3F20E78BCBC027B2909F24C73863" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_61C91FB5F5CBB98F932D909F24C77957" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7BDB2CBE29E9BB02C2CA909F24C6D9D7" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_61C91FB5F5CBB98F932D909F24C77957" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ConsolidatedStatementOfShareownersEquityParenthetical" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/CoverPage" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssets" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_37EC814755585B35A0B2F49E7337A2EA" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_8BBB5B102A9C5BE5985A6E6CF2CA781F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_37EC814755585B35A0B2F49E7337A2EA" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_8BBB5B102A9C5BE5985A6E6CF2CA781F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_534BAF884B0D57959655940D1DAE9480" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_8BBB5B102A9C5BE5985A6E6CF2CA781F" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_534BAF884B0D57959655940D1DAE9480" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_9E6395C87A7EDCFE6CB4D4879AF19933_FD0A49BE8D885D598C8A865D27E4614C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_534BAF884B0D57959655940D1DAE9480" xlink:to="loc_us-gaap_SegmentDomain_9E6395C87A7EDCFE6CB4D4879AF19933_FD0A49BE8D885D598C8A865D27E4614C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FCB3BBC75366576186DFC94F216411F2" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_534BAF884B0D57959655940D1DAE9480" xlink:to="loc_us-gaap_SegmentDomain_FCB3BBC75366576186DFC94F216411F2" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ArchitectureAndSoftwareMember" xlink:label="loc_rok_ArchitectureAndSoftwareMember_984E4D6099D65C999D999302264D26BE" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FCB3BBC75366576186DFC94F216411F2" xlink:to="loc_rok_ArchitectureAndSoftwareMember_984E4D6099D65C999D999302264D26BE" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ControlProductsAndSolutionsMember" xlink:label="loc_rok_ControlProductsAndSolutionsMember_03FC02B22EEC5150B90139015D4F372F" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FCB3BBC75366576186DFC94F216411F2" xlink:to="loc_rok_ControlProductsAndSolutionsMember_03FC02B22EEC5150B90139015D4F372F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_E17F8E9CF6325B92B08A47EA0ABF6B11" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_37EC814755585B35A0B2F49E7337A2EA" xlink:to="loc_us-gaap_GoodwillRollForward_E17F8E9CF6325B92B08A47EA0ABF6B11" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_85D73080DC195E94A4064E86876E9749" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_E17F8E9CF6325B92B08A47EA0ABF6B11" xlink:to="loc_us-gaap_Goodwill_85D73080DC195E94A4064E86876E9749" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_BFF2F77F5A305B3E82054CAE51A3A445" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_E17F8E9CF6325B92B08A47EA0ABF6B11" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_BFF2F77F5A305B3E82054CAE51A3A445" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_3CCCD4B26C9453D09D178E300F05D471" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_E17F8E9CF6325B92B08A47EA0ABF6B11" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_3CCCD4B26C9453D09D178E300F05D471" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_F8E0D3B8355BDFCA062E7926D710EA5F" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_BF18D182082A01D9D8B37926D70EEFEF" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_F8E0D3B8355BDFCA062E7926D710EA5F" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_BF18D182082A01D9D8B37926D70EEFEF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BEA7689F5F0FA8A6EE797926D70FEDB3" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_BF18D182082A01D9D8B37926D70EEFEF" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BEA7689F5F0FA8A6EE797926D70FEDB3" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_159C81A6B4BD434AC5A47926D70F2FDA_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BEA7689F5F0FA8A6EE797926D70FEDB3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_159C81A6B4BD434AC5A47926D70F2FDA_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_159C81A6B4BD434AC5A47926D70F2FDA" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BEA7689F5F0FA8A6EE797926D70FEDB3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_159C81A6B4BD434AC5A47926D70F2FDA" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_0DBFA59B379DB27DE6DB7926D70FD736" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_159C81A6B4BD434AC5A47926D70F2FDA" xlink:to="loc_us-gaap_TrademarksMember_0DBFA59B379DB27DE6DB7926D70FD736" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_303876F67F3604F49AAC7926D7102134" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_F8E0D3B8355BDFCA062E7926D710EA5F" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_303876F67F3604F49AAC7926D7102134" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45DFE9CD04DD0609550E7926D71273CC" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_83812F7D46B54808FB047926D7106477" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45DFE9CD04DD0609550E7926D71273CC" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_83812F7D46B54808FB047926D7106477" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_C1851E359C42B3C27CAA7926D71037CF" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_83812F7D46B54808FB047926D7106477" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_C1851E359C42B3C27CAA7926D71037CF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_C1851E359C42B3C27CAA7926D71037CF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_C1851E359C42B3C27CAA7926D71037CF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_D398B062F23DAABF2B6B7926D7116F29" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_D398B062F23DAABF2B6B7926D7116F29" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_4A77E4D08353D20D54A87926D711A62A" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:to="loc_us-gaap_CustomerRelationshipsMember_4A77E4D08353D20D54A87926D711A62A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_4D307C20E37F70FBB7567926D7114E72" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_4D307C20E37F70FBB7567926D7114E72" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_83CC97DD42AF6339429E7926D711DC2A" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:to="loc_us-gaap_TrademarksMember_83CC97DD42AF6339429E7926D711DC2A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_24AA70F7906C2E6A28667926D7126215" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7E93CA794D3AACEBCB407926D710FA78" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_24AA70F7906C2E6A28667926D7126215" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45DFE9CD04DD0609550E7926D71273CC" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_31B95B715A6B893C5A227926D7124E0C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_31B95B715A6B893C5A227926D7124E0C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_34C3660B6B451A1FFCA67926D713F12D" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_34C3660B6B451A1FFCA67926D713F12D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_535B3EEBFAE7ED3887A77926D71380B9" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_535B3EEBFAE7ED3887A77926D71380B9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_BE609A1D0E6ED3B8101D7926D713D476" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_BE609A1D0E6ED3B8101D7926D713D476" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_C53233FF8EF8270C1A847926D713C3F2" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_BB5CF9B3B49A9D2D99907926D7123924" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_C53233FF8EF8270C1A847926D713C3F2" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45DFE9CD04DD0609550E7926D71273CC" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_8D98081FE74FCBD6216D7940A459F22F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_8D98081FE74FCBD6216D7940A459F22F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_D9170D295B7D4234C7897926D7142138" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_D9170D295B7D4234C7897926D7142138" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_5B189BC4C6939A262DA77926D714530E" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_5B189BC4C6939A262DA77926D714530E" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_ED07AB50F67EDA7959C07926D7142274" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_ED07AB50F67EDA7959C07926D7142274" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_04F78742D337A8F6CBA57926D7145E22" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_7A2456DB68162FE9A3967926D7135AE0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_04F78742D337A8F6CBA57926D7145E22" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_36C3C30A83ACEC9689DE7926D71439E0" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45DFE9CD04DD0609550E7926D71273CC" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_36C3C30A83ACEC9689DE7926D71439E0" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/IncomeTaxes" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/IncomeTaxesDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/Inventories" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/InventoriesDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/InventoriesTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/Investments" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsidiarySaleOfStockLineItems" xlink:label="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_E581BE13D80B56B1EF9E7803F442D100" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_E581BE13D80B56B1EF9E7803F442D100" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_526105BB4D05C43A8D4F7803F443DBF8" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_E581BE13D80B56B1EF9E7803F442D100" xlink:to="loc_srt_CounterpartyNameAxis_526105BB4D05C43A8D4F7803F443DBF8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5ECAC99D40BD70E499437803F443942F_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_526105BB4D05C43A8D4F7803F443DBF8" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5ECAC99D40BD70E499437803F443942F_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5ECAC99D40BD70E499437803F443942F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_526105BB4D05C43A8D4F7803F443DBF8" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5ECAC99D40BD70E499437803F443942F" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_PTCMember" xlink:label="loc_rok_PTCMember_26DA78A5FF4B24C863B77803F444E737" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5ECAC99D40BD70E499437803F443942F" xlink:to="loc_rok_PTCMember_26DA78A5FF4B24C863B77803F444E737" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_4082506CE7ED9F950CD07803F44421B8" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_E581BE13D80B56B1EF9E7803F442D100" xlink:to="loc_srt_RangeAxis_4082506CE7ED9F950CD07803F44421B8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4082506CE7ED9F950CD07803F44421B8" xlink:to="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4082506CE7ED9F950CD07803F44421B8" xlink:to="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_A64A7BF3CD9BA0AD97237803F4444EEA" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE" xlink:to="loc_srt_MinimumMember_A64A7BF3CD9BA0AD97237803F4444EEA" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_B7507EC0FA606F7B729E7803F44438EB" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4DE9DEA6D318A05EFA477803F444C4EE" xlink:to="loc_srt_MaximumMember_B7507EC0FA606F7B729E7803F44438EB" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_EquitySecuritiesFVNINumberOfShares" xlink:label="loc_rok_EquitySecuritiesFVNINumberOfShares_8B93849DDBAFD14532AD7803F4454A23" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_rok_EquitySecuritiesFVNINumberOfShares_8B93849DDBAFD14532AD7803F4454A23" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_EquitySecuritiesFVNIPricePerShare" xlink:label="loc_rok_EquitySecuritiesFVNIPricePerShare_AC64031E52BCF7A7C88B7803F44562F6" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_rok_EquitySecuritiesFVNIPricePerShare_AC64031E52BCF7A7C88B7803F44562F6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNiCost" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCost_9B4EA700AF8AA4E87DD77803F4458197" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCost_9B4EA700AF8AA4E87DD77803F4458197" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_EquitySecuritiesFVNITransferRestrictionsPeriod" xlink:label="loc_rok_EquitySecuritiesFVNITransferRestrictionsPeriod_F88E28A0A1664A2EE3017803F445F75B" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_rok_EquitySecuritiesFVNITransferRestrictionsPeriod_F88E28A0A1664A2EE3017803F445F75B" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SaleOfStockTradingPeriod" xlink:label="loc_rok_SaleOfStockTradingPeriod_519F7F0821E0E8CD170B7803F446ACA2" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_rok_SaleOfStockTradingPeriod_519F7F0821E0E8CD170B7803F446ACA2" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SaleOfStockPercentageOfTotalOutstandingCommonStockThatMayBeTransferred" xlink:label="loc_rok_SaleOfStockPercentageOfTotalOutstandingCommonStockThatMayBeTransferred_BD275C3B9BB61813A5887803F446F14C" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_rok_SaleOfStockPercentageOfTotalOutstandingCommonStockThatMayBeTransferred_BD275C3B9BB61813A5887803F446F14C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_F9E04E401E8D94733C037803F4463C37" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_F9E04E401E8D94733C037803F4463C37" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_9B8D24C5481923D3567F7803F4464446" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems_CD17D2D689636F9946597803F4459953" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_9B8D24C5481923D3567F7803F4464446" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/InvestmentsSummaryOfInvestmentsDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/InvestmentsTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/Leases" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesComponentsOfLeaseExpenseDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesNarrativeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_85EC2C58473D6D3E1B1958369EBB45F0" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_44DAE9374F0B7254202D58369EBB3658" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_85EC2C58473D6D3E1B1958369EBB45F0" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_44DAE9374F0B7254202D58369EBB3658" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_B4CEB379952996D9601458369EBB0D3F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_44DAE9374F0B7254202D58369EBB3658" xlink:to="loc_srt_RangeAxis_B4CEB379952996D9601458369EBB0D3F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_B4CEB379952996D9601458369EBB0D3F" xlink:to="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_B4CEB379952996D9601458369EBB0D3F" xlink:to="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_C0F14027C20A1E413EB158369EBB9ECE" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A" xlink:to="loc_srt_MinimumMember_C0F14027C20A1E413EB158369EBB9ECE" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_9E98CDF7BAE70DBDC9C558369EBB010D" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_E4606029A25A1689228458369EBB005A" xlink:to="loc_srt_MaximumMember_9E98CDF7BAE70DBDC9C558369EBB010D" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_LesseeOperatingLeaseRemainingLeaseTerm" xlink:label="loc_rok_LesseeOperatingLeaseRemainingLeaseTerm_80E67DE28804D9E89C9B583FCEDCECB7" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_85EC2C58473D6D3E1B1958369EBB45F0" xlink:to="loc_rok_LesseeOperatingLeaseRemainingLeaseTerm_80E67DE28804D9E89C9B583FCEDCECB7" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesOperatingLeaseMaturityAsu840Details" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesOperatingLeaseMaturityAsu842Details" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesSupplementalBalanceSheetDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesSupplementalCashFlowsDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LeasesTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LongTermAndShortTermDebt" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtNarrativeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_C072DC3A3D65E6B5B6C691904FE28951" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_DebtInstrumentTable_C072DC3A3D65E6B5B6C691904FE28951" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_C8C02351496ED59968E391904FE39342" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_C072DC3A3D65E6B5B6C691904FE28951" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_C8C02351496ED59968E391904FE39342" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_C8C02351496ED59968E391904FE39342" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_C8C02351496ED59968E391904FE39342" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_InterestBearingLoanMember" xlink:label="loc_rok_InterestBearingLoanMember_24CE2C5787A7477DA2F291904FE44D1A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0" xlink:to="loc_rok_InterestBearingLoanMember_24CE2C5787A7477DA2F291904FE44D1A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansMember" xlink:label="loc_us-gaap_LoansMember_62ECEBF2D138346DEE4191904FE9B59F" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0" xlink:to="loc_us-gaap_LoansMember_62ECEBF2D138346DEE4191904FE9B59F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableToBanksMember" xlink:label="loc_us-gaap_NotesPayableToBanksMember_C30414F9EC6D0E70D59491904FE9F3D6" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_47453D1F61F621BBCCD591904FE32AA0" xlink:to="loc_us-gaap_NotesPayableToBanksMember_C30414F9EC6D0E70D59491904FE9F3D6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_579B946C6ECFF657956691904FEA46B4" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_C072DC3A3D65E6B5B6C691904FE28951" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_579B946C6ECFF657956691904FEA46B4" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7417128D61A7E04623F391904FEA68A9_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_579B946C6ECFF657956691904FEA46B4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7417128D61A7E04623F391904FEA68A9_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7417128D61A7E04623F391904FEA68A9" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_579B946C6ECFF657956691904FEA46B4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7417128D61A7E04623F391904FEA68A9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableOtherPayablesMember" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_79871317B8E32ACA41B691904FEA5BC8" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7417128D61A7E04623F391904FEA68A9" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_79871317B8E32ACA41B691904FEA5BC8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_420FB68562853E1BDDBB91904FEA7648" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_C072DC3A3D65E6B5B6C691904FE28951" xlink:to="loc_us-gaap_DebtInstrumentAxis_420FB68562853E1BDDBB91904FEA7648" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142_default" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_420FB68562853E1BDDBB91904FEA7648" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142_default" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_420FB68562853E1BDDBB91904FEA7648" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A2.050NotesDueMarch2020Member" xlink:label="loc_rok_A2.050NotesDueMarch2020Member_B4EBACA666895A27B13E91904FEB11EC" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142" xlink:to="loc_rok_A2.050NotesDueMarch2020Member_B4EBACA666895A27B13E91904FEB11EC" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A2.875NotesDueMarch2025Member" xlink:label="loc_rok_A2.875NotesDueMarch2025Member_D525F3BF60351E6CC54591904FEB81E0" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_90474CCADAC51DC4A5B291904FEB1142" xlink:to="loc_rok_A2.875NotesDueMarch2025Member_D525F3BF60351E6CC54591904FEB81E0" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_05AE06A5A4BE1A74048491904FEC4DBC" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_ShortTermBorrowings_05AE06A5A4BE1A74048491904FEC4DBC" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_FB5560E680E968D4048791904FECAA08" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_RepaymentsOfDebt_FB5560E680E968D4048791904FECAA08" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_ECE4D0B7D552B27AAEFC91904FECC764" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_ECE4D0B7D552B27AAEFC91904FECC764" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_C8FB068D088E34FBC7C691904FECCE97" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_C8FB068D088E34FBC7C691904FECCE97" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_55C0FDA1947BBD5BDDDA91904FECD6DD" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_DebtInstrumentTerm_55C0FDA1947BBD5BDDDA91904FECD6DD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4EA1078CAE451BC5B7AE91904FEC700F" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4EA1078CAE451BC5B7AE91904FEC700F" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_RatioofEBITDAtoInterestExpense" xlink:label="loc_rok_RatioofEBITDAtoInterestExpense_83A205C60A379F105B2791904FED935B" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_rok_RatioofEBITDAtoInterestExpense_83A205C60A379F105B2791904FED935B" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities_E44C1E5C179514423EC891904FED1262" xlink:type="locator"/>
<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities_E44C1E5C179514423EC891904FED1262" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnOilAndGasHedgingActivity" xlink:label="loc_us-gaap_GainLossOnOilAndGasHedgingActivity_3A14576A84D06BEA5C0791912909B8BB" xlink:type="locator"/>
<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01DA7E130D5CADEDBA4D91904FEB7B26" xlink:to="loc_us-gaap_GainLossOnOilAndGasHedgingActivity_3A14576A84D06BEA5C0791912909B8BB" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtSummaryOfLongTermDebtDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_CA38134329FB5F8DBC5323A74D9A87D5" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_DebtInstrumentTable_CA38134329FB5F8DBC5323A74D9A87D5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_44EBEA8EF7995A52AE99B529E0FC3BB6" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_CA38134329FB5F8DBC5323A74D9A87D5" xlink:to="loc_us-gaap_DebtInstrumentAxis_44EBEA8EF7995A52AE99B529E0FC3BB6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_D11124F76D2D25247C509ADDF51D2128_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_44EBEA8EF7995A52AE99B529E0FC3BB6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_D11124F76D2D25247C509ADDF51D2128_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_44EBEA8EF7995A52AE99B529E0FC3BB6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A2.050NotesDueMarch2020Member" xlink:label="loc_rok_A2.050NotesDueMarch2020Member_F03C2DCC5EDD5EAA81802EFDFF8F94B5" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A2.050NotesDueMarch2020Member_F03C2DCC5EDD5EAA81802EFDFF8F94B5" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A2.875NotesDueMarch2025Member" xlink:label="loc_rok_A2.875NotesDueMarch2025Member_3BFCA94C534C58CFB0E7A3311337117A" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A2.875NotesDueMarch2025Member_3BFCA94C534C58CFB0E7A3311337117A" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A6.70DebenturesDueJanuary2028Member" xlink:label="loc_rok_A6.70DebenturesDueJanuary2028Member_B5CF14B1064958F7940AC266166EB654" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A6.70DebenturesDueJanuary2028Member_B5CF14B1064958F7940AC266166EB654" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A3.500NotesDueMarch2029Member" xlink:label="loc_rok_A3.500NotesDueMarch2029Member_EF43FC33FA2E5CAB8ED0E2582D510F60" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A3.500NotesDueMarch2029Member_EF43FC33FA2E5CAB8ED0E2582D510F60" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A6.25DebenturesDueDecember2037Member" xlink:label="loc_rok_A6.25DebenturesDueDecember2037Member_A29AE31D93B3597BAF11446A6BC66BA1" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A6.25DebenturesDueDecember2037Member_A29AE31D93B3597BAF11446A6BC66BA1" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A4.200NotesDueMarch2049Member" xlink:label="loc_rok_A4.200NotesDueMarch2049Member_D3BD4176F9E6547BAFF2AF55A83788F5" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A4.200NotesDueMarch2049Member_D3BD4176F9E6547BAFF2AF55A83788F5" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_A5.20DebenturesDueJanuary2098Member" xlink:label="loc_rok_A5.20DebenturesDueJanuary2098Member_5FB6646EA3625F2EBE2FA3D1C5B03E0F" xlink:type="locator"/>
<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_A7CD65AC9A3E50E8ADF7D79FC92D3EA6" xlink:to="loc_rok_A5.20DebenturesDueJanuary2098Member_5FB6646EA3625F2EBE2FA3D1C5B03E0F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_ABB2209579685A9598A5D1331AE3A6F1" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_ABB2209579685A9598A5D1331AE3A6F1" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_8473BCDE6E8255EB85AFFA8C6E236B84" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_8473BCDE6E8255EB85AFFA8C6E236B84" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_7CD5385B6E72528AB323BE7174B9B7B5" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_LongTermDebt_7CD5385B6E72528AB323BE7174B9B7B5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_69668A4B561C548EB05DF0634B52F2FF" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_LongTermDebtCurrent_69668A4B561C548EB05DF0634B52F2FF" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_695DE0A9CC245DAC853BDFBB7DF24E4F" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_695DE0A9CC245DAC853BDFBB7DF24E4F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_49504090435B5688BF0C30284C7FFE25" xlink:type="locator"/>
<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ADEEF499944D5BD9952F81A49A2E01A2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_49504090435B5688BF0C30284C7FFE25" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/LongTermAndShortTermDebtSummaryOfLongTermDebtInstrumentsTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/OtherCurrentLiabilities" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/OtherCurrentLiabilitiesScheduleOfOtherCurrentLiabilitiesDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/OtherCurrentLiabilitiesTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RetirementBenefits" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RetirementBenefitsComponentsOfNetPeriodicBenefitCostIncomeDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3F5419A17F5589EB4B2F08C29132A33" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_8CE4034D3C0E5CE48CC557243403BE2D" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3F5419A17F5589EB4B2F08C29132A33" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_8CE4034D3C0E5CE48CC557243403BE2D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_8A0BEABD12C8586AA10006AE3EF86852" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_8CE4034D3C0E5CE48CC557243403BE2D" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_8A0BEABD12C8586AA10006AE3EF86852" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5189C126EFE7734D7A8AD2B7AC2E13E6_FD0A49BE8D885D598C8A865D27E4614C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8A0BEABD12C8586AA10006AE3EF86852" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5189C126EFE7734D7A8AD2B7AC2E13E6_FD0A49BE8D885D598C8A865D27E4614C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_97031B7992745FD9887DE75AF9B5633E" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8A0BEABD12C8586AA10006AE3EF86852" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_97031B7992745FD9887DE75AF9B5633E" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_307E07CAD7B15F0F8A7C29F97F73D98A" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_97031B7992745FD9887DE75AF9B5633E" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_307E07CAD7B15F0F8A7C29F97F73D98A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E56A94C5111255CDA6875971D3207592" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_97031B7992745FD9887DE75AF9B5633E" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E56A94C5111255CDA6875971D3207592" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3F5419A17F5589EB4B2F08C29132A33" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_9FA473F841F35F9B8B651F935CFAD422" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_9FA473F841F35F9B8B651F935CFAD422" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_7369324CC0FE583AB785CF949B64A694" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_7369324CC0FE583AB785CF949B64A694" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F49EDE7FB6AF5C188CEFBB1EE23FD94A" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F49EDE7FB6AF5C188CEFBB1EE23FD94A" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentForAmortizationAbstract" xlink:label="loc_us-gaap_AdjustmentForAmortizationAbstract_B583F00AF307518C9FE9053EE66A3242" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:to="loc_us-gaap_AdjustmentForAmortizationAbstract_B583F00AF307518C9FE9053EE66A3242" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_C8B473B694415340B2A03C6659C0CC4F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_B583F00AF307518C9FE9053EE66A3242" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_C8B473B694415340B2A03C6659C0CC4F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_9C30DEC038685C6D878461494DDA16D2" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_B583F00AF307518C9FE9053EE66A3242" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_9C30DEC038685C6D878461494DDA16D2" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_5F7CD8C3A32353B1BA1AF7D5F1660D1C" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_B583F00AF307518C9FE9053EE66A3242" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_5F7CD8C3A32353B1BA1AF7D5F1660D1C" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_B364F25113505817936B6E5E3026B4AA" xlink:type="locator"/>
<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_FCFF13BFA438552290080ADEDEBE9785" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_B364F25113505817936B6E5E3026B4AA" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RetirementBenefitsTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognition" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionContractBalancesDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndByGeographicRegionDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_F085A847D40850B6A17DE8D0804FAE80" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_0272FF7F19E850E1B540D0AFA8A4A376" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_F085A847D40850B6A17DE8D0804FAE80" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_0272FF7F19E850E1B540D0AFA8A4A376" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FE5EBECF01615829ACF9B52A7B3DBB91" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_0272FF7F19E850E1B540D0AFA8A4A376" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_FE5EBECF01615829ACF9B52A7B3DBB91" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_59FA72A547825FC1CE90884E84029A6C_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FE5EBECF01615829ACF9B52A7B3DBB91" xlink:to="loc_us-gaap_SegmentDomain_59FA72A547825FC1CE90884E84029A6C_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8931F1F27FF85A7694341F7D12A65C9F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FE5EBECF01615829ACF9B52A7B3DBB91" xlink:to="loc_us-gaap_SegmentDomain_8931F1F27FF85A7694341F7D12A65C9F" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ArchitectureAndSoftwareMember" xlink:label="loc_rok_ArchitectureAndSoftwareMember_C6884AFAD6F250268CBEA908CB2BDEE4" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8931F1F27FF85A7694341F7D12A65C9F" xlink:to="loc_rok_ArchitectureAndSoftwareMember_C6884AFAD6F250268CBEA908CB2BDEE4" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ControlProductsAndSolutionsMember" xlink:label="loc_rok_ControlProductsAndSolutionsMember_E7AB3B9BA2B0510984F128697F3338FD" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8931F1F27FF85A7694341F7D12A65C9F" xlink:to="loc_rok_ControlProductsAndSolutionsMember_E7AB3B9BA2B0510984F128697F3338FD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_0C4D15CEA79B5A47BD3AF1BFFD040AC8" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_0272FF7F19E850E1B540D0AFA8A4A376" xlink:to="loc_srt_StatementGeographicalAxis_0C4D15CEA79B5A47BD3AF1BFFD040AC8" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_CAB408E2662F613EDB9B884E84031530_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_0C4D15CEA79B5A47BD3AF1BFFD040AC8" xlink:to="loc_srt_SegmentGeographicalDomain_CAB408E2662F613EDB9B884E84031530_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_0C4D15CEA79B5A47BD3AF1BFFD040AC8" xlink:to="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NorthAmericaMember" xlink:label="loc_srt_NorthAmericaMember_6699D7F83E1D5D43BB17793FE5CAA103" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:to="loc_srt_NorthAmericaMember_6699D7F83E1D5D43BB17793FE5CAA103" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_F16860F16EFD5CA592A3A68C6F83D344" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:to="loc_us-gaap_EMEAMember_F16860F16EFD5CA592A3A68C6F83D344" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AsiaPacificMember" xlink:label="loc_srt_AsiaPacificMember_A00831707A9857E98ED7D886B105CBDD" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:to="loc_srt_AsiaPacificMember_A00831707A9857E98ED7D886B105CBDD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LatinAmericaMember" xlink:label="loc_srt_LatinAmericaMember_89EBB6F990B25D0A8052E4E34A3021F7" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_E806DD61657359ADA289870AF3DCA380" xlink:to="loc_srt_LatinAmericaMember_89EBB6F990B25D0A8052E4E34A3021F7" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_921DE3BB11D8596786FB9C8316569D11" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_F085A847D40850B6A17DE8D0804FAE80" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_921DE3BB11D8596786FB9C8316569D11" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionDisaggregationOfRevenueByOperatingSegmentAndMajorTypesOfProductsOrServicesDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_93CB753AFC2750A1BBB0780E467AEE35" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_7768FC11CD7E5CEEA657EC5B14C6A923" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_93CB753AFC2750A1BBB0780E467AEE35" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_7768FC11CD7E5CEEA657EC5B14C6A923" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_B93D5AC7B76E544790495352E1480783" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7768FC11CD7E5CEEA657EC5B14C6A923" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_B93D5AC7B76E544790495352E1480783" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_E3E4052490FA82DE5F77884E83FCE3EF_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_B93D5AC7B76E544790495352E1480783" xlink:to="loc_us-gaap_SegmentDomain_E3E4052490FA82DE5F77884E83FCE3EF_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_78FD3AABC7E7563D9061518FD09B13DE" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_B93D5AC7B76E544790495352E1480783" xlink:to="loc_us-gaap_SegmentDomain_78FD3AABC7E7563D9061518FD09B13DE" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ArchitectureAndSoftwareMember" xlink:label="loc_rok_ArchitectureAndSoftwareMember_C3354643646E5532B07CDEEA7545FA97" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_78FD3AABC7E7563D9061518FD09B13DE" xlink:to="loc_rok_ArchitectureAndSoftwareMember_C3354643646E5532B07CDEEA7545FA97" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_ControlProductsAndSolutionsMember" xlink:label="loc_rok_ControlProductsAndSolutionsMember_D756361714E65645B6A8080316FA79E9" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_78FD3AABC7E7563D9061518FD09B13DE" xlink:to="loc_rok_ControlProductsAndSolutionsMember_D756361714E65645B6A8080316FA79E9" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_23F387C4C9A15E8490DAE07107596B04" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7768FC11CD7E5CEEA657EC5B14C6A923" xlink:to="loc_srt_ProductOrServiceAxis_23F387C4C9A15E8490DAE07107596B04" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_1AFBE47E1FE63FA06587884E83FDB61B_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_23F387C4C9A15E8490DAE07107596B04" xlink:to="loc_srt_ProductsAndServicesDomain_1AFBE47E1FE63FA06587884E83FDB61B_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_4EBC907EDC4B5728BC14008DB24A9225" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_23F387C4C9A15E8490DAE07107596B04" xlink:to="loc_srt_ProductsAndServicesDomain_4EBC907EDC4B5728BC14008DB24A9225" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_93424778850E5297A22BD827CBC349F2" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4EBC907EDC4B5728BC14008DB24A9225" xlink:to="loc_us-gaap_ProductMember_93424778850E5297A22BD827CBC349F2" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_SolutionsandServicesMember" xlink:label="loc_rok_SolutionsandServicesMember_6EB18EF75BBF591E89395016498D96AD" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4EBC907EDC4B5728BC14008DB24A9225" xlink:to="loc_rok_SolutionsandServicesMember_6EB18EF75BBF591E89395016498D96AD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_09254408B606588FB82D89DEED79A524" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_93CB753AFC2750A1BBB0780E467AEE35" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_09254408B606588FB82D89DEED79A524" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionPerformanceObligationDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_850EF6E08C83513C8BA6773E6D8C40FC" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_606DBDEF90AC501DA1FEFDEF3321569C" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_850EF6E08C83513C8BA6773E6D8C40FC" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_606DBDEF90AC501DA1FEFDEF3321569C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_1241718E2CDD5CF28666B033618D43A5" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_606DBDEF90AC501DA1FEFDEF3321569C" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_1241718E2CDD5CF28666B033618D43A5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_D463196284F959178F287BECBAE287E4" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_850EF6E08C83513C8BA6773E6D8C40FC" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_D463196284F959178F287BECBAE287E4" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/RevenueRecognitionTables" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ShareBasedCompensation" xlink:type="extended"/>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ShareBasedCompensationDetails" xlink:type="extended">
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:type="locator"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EE6A2519AC3B564295BF9EA20B5C20EA" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EE6A2519AC3B564295BF9EA20B5C20EA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_6BF45607FBE4595C803329DA5F65E460" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EE6A2519AC3B564295BF9EA20B5C20EA" xlink:to="loc_us-gaap_AwardTypeAxis_6BF45607FBE4595C803329DA5F65E460" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8EA9F569A20F24F838F9884E83C0D3EA_EC83AA873FEE5411940E0E32F512764F" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6BF45607FBE4595C803329DA5F65E460" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8EA9F569A20F24F838F9884E83C0D3EA_EC83AA873FEE5411940E0E32F512764F" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6BF45607FBE4595C803329DA5F65E460" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_1BE6B02B3CC558C0B5844732B2DF160D" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:to="loc_us-gaap_EmployeeStockOptionMember_1BE6B02B3CC558C0B5844732B2DF160D" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_18675CDEC5E853BBBCE37E340B67E62B" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:to="loc_us-gaap_PerformanceSharesMember_18675CDEC5E853BBBCE37E340B67E62B" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_RestrictedStockAndRestrictedStockUnitsMember" xlink:label="loc_rok_RestrictedStockAndRestrictedStockUnitsMember_BA3FD87756835F03AAD1BC73CF6E1E19" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:to="loc_rok_RestrictedStockAndRestrictedStockUnitsMember_BA3FD87756835F03AAD1BC73CF6E1E19" xlink:type="arc"/>
<link:loc xlink:href="rok-20200630.xsd#rok_UnrestrictedStockMember" xlink:label="loc_rok_UnrestrictedStockMember_B420466CA6F656D9B2F6B9F178838506" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0AAA89265FF3575E8A7016DABB2946B6" xlink:to="loc_rok_UnrestrictedStockMember_B420466CA6F656D9B2F6B9F178838506" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_D99421FECFFB5110A278EE9C5D9465FD" xlink:type="locator"/>
<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_D99421FECFFB5110A278EE9C5D9465FD" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0C0786D0BE7B5CF7951DAAF8E1764CE5" xlink:type="locator"/>
<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_0C0786D0BE7B5CF7951DAAF8E1764CE5" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6E16C305038A564BB93735C2E5AC7626" xlink:type="locator"/>
<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6E16C305038A564BB93735C2E5AC7626" xlink:type="arc"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_90A6278F6A9B5AF0AEEE7FA10C4DCE38" xlink:type="locator"/>
<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10EFC3D0E0CB5D3197C5BEBE64D368FD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_90A6278F6A9B5AF0AEEE7FA10C4DCE38" xlink:type="arc"/>
</link:definitionLink>
<link:definitionLink xlink:role="http://www.rockwellautomation.com/role/ShareBasedCompensationTables" xlink:type="extended"/>
</link:linkbase>


4 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

11/08/23  Rockwell Automation, Inc.         10-K        9/30/23  140:16M
11/08/22  Rockwell Automation, Inc.         10-K        9/30/22  139:18M
11/09/21  Rockwell Automation, Inc.         10-K        9/30/21  136:18M
11/10/20  Rockwell Automation, Inc.         10-K        9/30/20  144:21M
Top
Filing Submission 0001024478-20-000026   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Sat., Apr. 27, 8:47:16.2pm ET